Someone who shall remain a nameless ex-gangster had people come looking for him. People with higher firepower guns.
So Squishy had to blow their car up to not get shot. Good old alien instant fuel conversion.
Plus he who was a bad men committed some biffo by bodily dragging one hoodlum out of the car. Lucky for him. Everybody else managed to not get shot.
He gets sent on his way as a warning that if they want something in future, ask politely, not with automatic gunfire.